CO in the planetary nebulae NGC 2346 and 6720

Details CO in the planetary nebulae NGC 2346 and 6720 CO in the planetary nebulae NGC 2346 and 6720

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220p..33h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, June 1, 1986, p. 33p-37p.

Astronomy and Astrophysics

Astronomy

25

Astronomical Spectroscopy, Carbon Monoxide, Ionized Gases, Molecular Gases, Planetary Nebulae, Emission Spectra, Line Spectra

Scientific paper

We report detection of the CO (2-1) line in the planetary nebulae NGC 2346 and 6720 (the Ring Nebula). Estimates of the amounts of molecular material associated with the CO emission yield ratios of molecular/ionized masses of >0.13 and >0.07 for NGC 2346 and 6720, respectively. Thus a significant fraction of each nebula has not yet been ionized by the central star.

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